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Southern Railway 4-SUB British Rail Class 405
4101 (prototype) in 1941
In service
1941-1983
Manufacturer
Eastleigh Works
Constructed
1941-1951
Number built
185 units
Number preserved
1 unit
Formation
DMBSO-TS-TSO-DMBSO
Capacity
368 - 386 Seats
Operators
Southern Railway
British Railways
Depots
Wimbledon Traincare Depot (London)
Specifications
Car length
DMBSO: 62 ft 6 in (19.05 m)
TS & TSO: 62 ft (18.90 m)
Width
9 ft (2.74 m)
Maximum speed
75 mph (121 km/h)
Weight
134 long tons (136 t; 150 short tons)
Traction motors
Four
Power output
Early units: 4 x 275 hp (205 kW) total 1,100 hp (820 kW)
Later units: 4 x 250 hp (190 kW) total 1,000 hp (750 kW)
Current collector(s)
Contact shoe
Braking system(s)
Air (Westinghouse)
The Southern Railway (SR) and the British Railways (Southern Region) (BR(S)) used the designation Sub to cover a wide variety of electric multiple-unit passenger trains that were used on inner-suburban workings in the South London area. The designation 'Sub' was first officially used in 1941 to refer to newly built 4-car units. However, during the 1940s large numbers of earlier '3-Car Suburban Sets' were increased to four cars by the addition of an 'Augmentation' trailer, and became part of the 4-Sub category. The SR and BR (S) continued to build or else rebuild 4-car units to slightly different designs which became part of the 4-Sub Class. Many of these later examples survived in passenger use until late 1983, by which time British Rail had allocated to them TOPS Class 405.
was scrapped around 02/2020. Wikimedia Commons has media related to SRClass4Sub. Moody 1968, p. 88 The ABC of Southern Electrics. 1943. p. 12. Moody...
these units as 3SUB. When rebuilt to four cars in the 1940s, they became class4SUB. The London, Brighton and South Coast Railway (LBSC) was the first of...
of working in passenger service on anything greater than 660V being the 4SUB Bulleid design. Thus all BR post-1951 EMU designs could cope with 750V or...
(4-car Electro-Pneumatic Brake) were a development of the Southern Railway (SR) 4Sub design, but incorporating electro-pneumatic brakes, unit-to-unit buckeye...
(sometimes two letters) prefixed by the number of cars in each unit, e.g. 4SUB for a four-car suburban unit. The Southern Region perpetuated this, and the...
both multiple units and locomotives) inherited from the SR. The EMU classification system (e.g. 4SUB, see here) system was also extended to include their...
own TOPS classes: List of British Rail diesel multiple unit classes British Rail locomotive and multiple unit numbering and classification SR multiple...
Colne Valley Railway.) BR Class 370 Vehicle 49006 (NDM) (To Crewe Heritage Centre) Third rail Southern Region BR Class 405 4Sub unit 4732 Vehicle nos:...
train stock was formed of 3 and latterly 4 car 3SUB and 4SUB units. In the early 1940s a new 4SUB was introduced. For a while in the late 1950s and 1960s...
units were built at Eastleigh Works. The units collectively were designated 4SUB. In 1903, the SECR obtained powers to electrify their lines. At a meeting...
inflexible and in the early 1940s a four-car unit was built. Classified 4Sub, the three-car units were gradually re-built into four-car units by adding...
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